diff options
| author | Andrea Arcangeli <aarcange@redhat.com> | 2011-01-13 15:47:17 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 17:32:47 -0800 |
| commit | a664b2d8555c659127bf8fe049a58449d394a707 (patch) | |
| tree | 14771f4ab93a9dda98174f21e0361a77e2aebfa6 /include/linux/khugepaged.h | |
| parent | 1ddd6db43a08cba56c7ee920800980862086f1c3 (diff) | |
| download | lwn-a664b2d8555c659127bf8fe049a58449d394a707.tar.gz lwn-a664b2d8555c659127bf8fe049a58449d394a707.zip | |
thp: madvise(MADV_NOHUGEPAGE)
Add madvise MADV_NOHUGEPAGE to mark regions that are not important to be
hugepage backed. Return -EINVAL if the vma is not of an anonymous type,
or the feature isn't built into the kernel. Never silently return
success.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/khugepaged.h')
| -rw-r--r-- | include/linux/khugepaged.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/khugepaged.h b/include/linux/khugepaged.h index 552f3184756c..6b394f0b5148 100644 --- a/include/linux/khugepaged.h +++ b/include/linux/khugepaged.h @@ -38,9 +38,10 @@ static inline void khugepaged_exit(struct mm_struct *mm) static inline int khugepaged_enter(struct vm_area_struct *vma) { if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags)) - if (khugepaged_always() || - (khugepaged_req_madv() && - vma->vm_flags & VM_HUGEPAGE)) + if ((khugepaged_always() || + (khugepaged_req_madv() && + vma->vm_flags & VM_HUGEPAGE)) && + !(vma->vm_flags & VM_NOHUGEPAGE)) if (__khugepaged_enter(vma->vm_mm)) return -ENOMEM; return 0; |